/* ARVEX Operations — site styles
   Layout concept: the site reads like a well-run facility work plan —
   ruled zones, tabular records, and deep-green command bands. */
:root {
  --paper: #F6F8F5;
  --surface: #FFFFFF;
  --ink: #15221A;
  --muted: #526157;
  --line: #D9E1DA;
  --green: #2F5F40;
  --green-text: #2F5F40;
  --band: #1D3D29;
  --band-ink: #EEF4EF;
  --band-muted: #B9CBBE;
  --copper: #C46A2C;
  --copper-text: #9C4D17;
  --btn: #A8541C;
  --btn-hover: #8F4615;
  --on-btn: #FFFFFF;
  --tint: #EAF0EB;
  --band-accent: #F0A46B;
  --ok: #2F6B45;
  --warn: #9C5A12;

  --f-display: "Saira", "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  --f-body: "Public Sans", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --wrap: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
  --radius: 6px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0E1612; --surface: #15211A; --ink: #E3ECE5; --muted: #9DB0A3; --line: #2A3A30;
    --green: #2F5F40; --green-text: #7DBB91; --band: #12291B; --band-ink: #E8F0EA; --band-muted: #A9BFB0;
    --copper: #E08A4A; --copper-text: #EFA36A; --btn: #E08A4A; --btn-hover: #EC9C60; --on-btn: #111A14;
    --tint: #1A2A20; --ok: #7DBB91; --warn: #EFA36A; --band-accent: #EFA36A;
    color-scheme: dark;
  }
  :root:not([data-theme="light"]) .logo-light { display: none; }
  :root:not([data-theme="light"]) .logo-dark { display: block; }
}
:root[data-theme="dark"] {
  --paper: #0E1612; --surface: #15211A; --ink: #E3ECE5; --muted: #9DB0A3; --line: #2A3A30;
  --green: #2F5F40; --green-text: #7DBB91; --band: #12291B; --band-ink: #E8F0EA; --band-muted: #A9BFB0;
  --copper: #E08A4A; --copper-text: #EFA36A; --btn: #E08A4A; --btn-hover: #EC9C60; --on-btn: #111A14;
  --tint: #1A2A20; --ok: #7DBB91; --warn: #EFA36A; --band-accent: #EFA36A;
  color-scheme: dark;
}
:root[data-theme="dark"] .logo-light { display: none; }
:root[data-theme="dark"] .logo-dark { display: block; }

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; animation: none !important; } }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--f-body); font-size: 17px; line-height: 1.6;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--copper-text); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--copper); outline-offset: 3px; border-radius: 2px; }
.skip { position: absolute; left: -9999px; top: 8px; z-index: 100; background: var(--surface); color: var(--ink); padding: 10px 14px; }
.skip:focus { left: 16px; }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }

/* Type scale */
h1, h2, h3, h4 { font-family: var(--f-display); line-height: 1.08; margin: 0; text-wrap: balance; letter-spacing: -0.005em; }
h1 { font-size: clamp(2.4rem, 5.6vw, 4.1rem); font-weight: 700; }
h2 { font-size: clamp(1.75rem, 3.4vw, 2.5rem); font-weight: 700; }
h3 { font-size: 1.3rem; font-weight: 600; }
h4 { font-size: 1.05rem; font-weight: 600; }
p { margin: 0; }
.lede { font-size: 1.15rem; color: var(--muted); max-width: 62ch; }
.eyebrow {
  font-family: var(--f-mono); font-size: 0.78rem; font-weight: 500; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--copper-text);
}
.mono { font-family: var(--f-mono); }
.stack { display: flex; flex-direction: column; gap: 1rem; }
.stack-lg { display: flex; flex-direction: column; gap: 1.5rem; }

/* Header */
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 50;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: saturate(140%) blur(8px); -webkit-backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 76px; }
.brand { display: flex; align-items: center; flex-shrink: 0; }
.brand img { height: 46px; width: auto; }
.logo-dark { display: none; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  font-family: var(--f-display); font-weight: 600; font-size: 0.98rem; color: var(--ink);
  text-decoration: none; padding: 8px 11px; border-radius: 4px; letter-spacing: 0.01em;
}
.nav a:hover { background: var(--tint); }
.nav a[aria-current="page"] { color: var(--green-text); box-shadow: inset 0 -2px 0 var(--copper); border-radius: 0; }
.nav .btn { margin-left: 8px; }
.menu-btn {
  display: none; background: none; border: 1px solid var(--line); color: var(--ink);
  border-radius: 4px; padding: 8px 12px; font: 600 0.95rem var(--f-display); cursor: pointer;
}
@media (max-width: 1060px) {
  .menu-btn { display: inline-flex; }
  .nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--surface); border-bottom: 1px solid var(--line); padding: 8px var(--gutter) 16px;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 4px; border-bottom: 1px solid var(--line); border-radius: 0; }
  .nav a[aria-current="page"] { box-shadow: inset 3px 0 0 var(--copper); padding-left: 12px; }
  .nav .btn { margin: 12px 0 0; justify-content: center; border-bottom: 0; }
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px; font-family: var(--f-display); font-weight: 600;
  font-size: 1rem; letter-spacing: 0.02em; text-decoration: none; border-radius: 4px; padding: 12px 20px;
  border: 2px solid transparent; cursor: pointer; transition: background .15s, border-color .15s, color .15s;
}
.btn-primary { background: var(--btn); color: var(--on-btn); }
.btn-primary:hover { background: var(--btn-hover); }
.btn-ghost { border-color: var(--green-text); color: var(--green-text); background: transparent; }
.btn-ghost:hover { background: var(--tint); }
.band .btn-ghost { border-color: var(--band-ink); color: var(--band-ink); }
.band .btn-ghost:hover { background: rgba(255,255,255,.08); }
.nav a.btn-primary, .nav a.btn-primary:hover { color: var(--on-btn); background: var(--btn); }
.nav a.btn-primary:hover { background: var(--btn-hover); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* Sections */
.section { padding-block: clamp(56px, 8vw, 96px); }
.section-tight { padding-block: clamp(40px, 5vw, 64px); }
.section-head { display: flex; flex-direction: column; gap: 14px; margin-bottom: clamp(28px, 4vw, 44px); max-width: 760px; }
.rule-top { border-top: 1px solid var(--line); }
.band { background: var(--band); color: var(--band-ink); }
.band .lede, .band p { color: var(--band-muted); }
.band h2, .band h3 { color: var(--band-ink); }
.band .eyebrow { color: var(--band-accent); }
.tinted { background: var(--tint); }

/* Hero */
.hero { padding-block: clamp(48px, 7vw, 88px) clamp(48px, 6vw, 72px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr); gap: clamp(32px, 5vw, 64px); align-items: center; }
.hero h1 span { display: block; }
.hero h1 .l2 { color: var(--ink); }
.hero h1 .l3 { color: var(--green-text); }
.hero-copy { display: flex; flex-direction: column; gap: 24px; min-width: 0; }
@media (max-width: 900px) { .hero-grid { grid-template-columns: minmax(0, 1fr); } }

/* Page hero (inner pages) */
.page-hero { padding-block: clamp(44px, 6vw, 76px) clamp(36px, 5vw, 56px); border-bottom: 1px solid var(--line); }
.page-hero .wrap { display: flex; flex-direction: column; gap: 18px; }
.page-hero h1 { font-size: clamp(2.1rem, 4.6vw, 3.3rem); max-width: 22ch; }

/* Inspection record (signature element) */
.record {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: 0 1px 0 var(--line), 0 18px 40px -24px rgba(21, 34, 26, .35); min-width: 0;
}
.record-head {
  display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap;
  padding: 14px 18px; border-bottom: 2px solid var(--green);
}
.record-head .mono { font-size: .76rem; color: var(--muted); letter-spacing: .06em; }
.record-title { font-family: var(--f-display); font-weight: 700; font-size: 1.02rem; letter-spacing: .06em; text-transform: uppercase; }
.record-scroll { overflow-x: auto; }
.record table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.record th { text-align: left; font: 500 .7rem var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); padding: 10px 18px 6px; }
.record td { padding: 10px 18px; border-top: 1px solid var(--line); vertical-align: top; }
.record td.zone { font-weight: 600; white-space: nowrap; }
.record td.freq { font-family: var(--f-mono); font-size: .82rem; white-space: nowrap; color: var(--muted); font-variant-numeric: tabular-nums; }
.pill { display: inline-block; font: 600 .7rem var(--f-mono); letter-spacing: .08em; text-transform: uppercase; padding: 3px 8px; border-radius: 3px; border: 1px solid currentColor; white-space: nowrap; }
.pill.ok { color: var(--ok); }
.pill.fix { color: var(--warn); }
.pill.sched { color: var(--muted); }
.record-foot { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding: 12px 18px; border-top: 1px dashed var(--line); font: .78rem var(--f-mono); color: var(--muted); }
.record-caption { font-size: .85rem; color: var(--muted); margin-top: 12px; }

/* Commitments strip */
.commit { border-block: 1px solid var(--line); background: var(--surface); }
.commit ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.commit li { padding: 22px 20px; border-left: 1px solid var(--line); display: flex; flex-direction: column; gap: 4px; }
.commit li:first-child { border-left: 0; padding-left: 0; }
.commit .k { font: 500 .72rem var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--copper-text); }
.commit .v { font-family: var(--f-display); font-weight: 600; font-size: 1.08rem; line-height: 1.25; }
@media (max-width: 860px) {
  .commit ul { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .commit li { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); }
  .commit li:nth-child(-n+2) { border-top: 0; }
  .commit li:nth-child(even) { padding-left: 20px; border-left: 1px solid var(--line); }
}

/* Service grid */
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.grid-3 > * { background: var(--surface); padding: 28px 26px; display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.grid-3 .code { font: 500 .74rem var(--f-mono); letter-spacing: .08em; color: var(--copper-text); }
.grid-3 p { color: var(--muted); font-size: .98rem; }
@media (max-width: 900px) { .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .grid-3 { grid-template-columns: minmax(0, 1fr); } }

/* Sequence (real ordered process) */
.seq { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); counter-reset: s; }
.seq li { counter-increment: s; padding: 0 20px 0 0; display: flex; flex-direction: column; gap: 8px; position: relative; }
.seq li::before {
  content: counter(s, decimal-leading-zero); font: 600 .85rem var(--f-mono); color: var(--copper-text);
  border-top: 3px solid var(--green); padding-top: 12px; display: block;
}
.band .seq li::before { color: var(--band-accent); border-top-color: var(--band-accent); }
.seq h3 { font-size: 1.15rem; }
.seq p { font-size: .95rem; color: var(--muted); }
.band .seq p { color: var(--band-muted); }
@media (max-width: 960px) { .seq { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 32px; } }
@media (max-width: 560px) { .seq { grid-template-columns: minmax(0, 1fr); } }

/* Two-column split */
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 72px); align-items: start; }
.split > * { min-width: 0; }
@media (min-width: 861px) { .split-contact { grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.8fr); } }
@media (max-width: 860px) { .split { grid-template-columns: minmax(0, 1fr); } }

/* Lists */
.checks { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.checks li { padding-left: 28px; position: relative; }
.checks li::before { content: ""; position: absolute; left: 2px; top: .55em; width: 12px; height: 7px; border-left: 2px solid var(--green-text); border-bottom: 2px solid var(--green-text); transform: rotate(-45deg); }
.cols-2 { columns: 2; column-gap: 40px; }
.cols-2 li { break-inside: avoid; }
@media (max-width: 600px) { .cols-2 { columns: 1; } }

/* Service detail rows */
.svc { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.4fr); gap: clamp(20px, 4vw, 56px); padding-block: 36px; border-top: 1px solid var(--line); }
.svc:last-child { border-bottom: 1px solid var(--line); }
.svc > * { min-width: 0; }
.svc .code { font: 500 .74rem var(--f-mono); letter-spacing: .08em; color: var(--copper-text); display: block; margin-bottom: 8px; }
.svc p { color: var(--muted); }
@media (max-width: 760px) { .svc { grid-template-columns: minmax(0, 1fr); } }

/* Notes / callouts */
.note { border-left: 3px solid var(--copper); background: var(--surface); padding: 18px 22px; color: var(--ink); }
.note strong { font-family: var(--f-display); letter-spacing: .02em; }

/* Data table */
.data { width: 100%; border-collapse: collapse; font-size: .97rem; }
.data th, .data td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.data th { font: 500 .72rem var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); background: var(--tint); }
.data td:first-child { font-weight: 600; }
.data .mono { font-variant-numeric: tabular-nums; }
.table-scroll { overflow-x: auto; border: 1px solid var(--line); background: var(--surface); }

/* Industry cards */
.ind { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.ind article { background: var(--surface); border: 1px solid var(--line); border-top: 3px solid var(--green); padding: 26px; display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.ind article p { color: var(--muted); }
.ind .tag { font: 500 .72rem var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--copper-text); }
@media (max-width: 760px) { .ind { grid-template-columns: minmax(0, 1fr); } }

/* Downloads */
.dl { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.dl a { display: flex; flex-direction: column; gap: 6px; padding: 22px; background: var(--surface); border: 1px solid var(--line); text-decoration: none; color: var(--ink); border-radius: var(--radius); }
.dl a:hover { border-color: var(--copper); }
.dl .fmt { font: 500 .72rem var(--f-mono); letter-spacing: .1em; color: var(--copper-text); }
.dl .t { font-family: var(--f-display); font-weight: 600; font-size: 1.1rem; }
.dl .d { font-size: .9rem; color: var(--muted); }
@media (max-width: 820px) { .dl { grid-template-columns: minmax(0, 1fr); } }

/* Leadership */
.leader { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: clamp(28px, 5vw, 64px); align-items: start; }
.leader > * { min-width: 0; }
.creds { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; }
.creds li { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 16px; padding: 14px 0; border-top: 1px solid rgba(255,255,255,.14); }
.creds .k { font: 500 .72rem var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--band-accent); padding-top: 3px; }
.creds .v { color: var(--band-ink); }
@media (max-width: 760px) { .leader { grid-template-columns: minmax(0, 1fr); } .creds li { grid-template-columns: minmax(0, 1fr); gap: 2px; } }

/* CTA */
.cta { display: flex; justify-content: space-between; align-items: center; gap: 28px; flex-wrap: wrap; }
.cta > div { max-width: 640px; display: flex; flex-direction: column; gap: 12px; }

/* Form */
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 20px; }
.form-grid .full { grid-column: 1 / -1; }
@media (max-width: 640px) { .form-grid { grid-template-columns: minmax(0, 1fr); } }
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field label, .field legend { font-weight: 600; font-size: .95rem; }
.field .req { color: var(--copper-text); font-weight: 600; }
.field .hint { font-size: .85rem; color: var(--muted); }
input[type="text"], input[type="email"], input[type="tel"], select, textarea {
  font: inherit; font-size: 1rem; color: var(--ink); background: var(--surface);
  border: 1px solid #8C9A90; border-radius: 4px; padding: 11px 12px; width: 100%;
}
textarea { min-height: 140px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 3px solid var(--copper); outline-offset: 1px; border-color: var(--copper); }
fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
.opts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 16px; margin-top: 6px; }
@media (max-width: 520px) { .opts { grid-template-columns: minmax(0, 1fr); } }
.opt { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; font-size: .97rem; }
.opt input { margin-top: 5px; width: 18px; height: 18px; accent-color: var(--green); flex-shrink: 0; }
.field-error { color: #B3261E; font-size: .88rem; }
:root[data-theme="dark"] .field-error { color: #FF8A80; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .field-error { color: #FF8A80; } }
.form-status { padding: 16px 18px; border-left: 3px solid var(--green); background: var(--tint); }
.form-status.err { border-left-color: var(--copper); }
.contact-side { display: flex; flex-direction: column; gap: 22px; }
.contact-side .item { display: flex; flex-direction: column; gap: 4px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.contact-side .k { font: 500 .72rem var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.contact-side .v { font-size: 1.05rem; overflow-wrap: anywhere; }
.copy-btn { align-self: flex-start; font: 600 .82rem var(--f-display); letter-spacing: .03em; background: none; border: 1px solid var(--line); color: var(--ink); border-radius: 4px; padding: 5px 10px; cursor: pointer; }
.copy-btn:hover { border-color: var(--copper); }

/* Prose (legal pages) */
.prose { max-width: 72ch; display: flex; flex-direction: column; gap: 16px; }
.prose h2 { font-size: 1.45rem; margin-top: 18px; }
.prose ul { margin: 0; padding-left: 22px; display: flex; flex-direction: column; gap: 6px; }

/* Footer */
.site-footer { background: var(--band); color: var(--band-muted); padding-block: 56px 32px; font-size: .95rem; }
.site-footer a { color: var(--band-ink); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }
.foot-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr)); gap: 36px; }
.foot-grid > * { min-width: 0; }
.foot-grid h2 { font: 500 .72rem var(--f-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--band-accent); margin-bottom: 12px; }
.foot-grid ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.foot-brand img { height: 52px; width: auto; margin-bottom: 16px; }
.foot-base { margin-top: 40px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.14); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: .85rem; }
@media (max-width: 860px) { .foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } .foot-brand { grid-column: 1 / -1; } }
@media (max-width: 480px) { .foot-grid { grid-template-columns: minmax(0, 1fr); } }

/* Photography */
.ph { display: block; width: 100%; max-width: 100%; object-fit: cover; background: var(--tint); }
.grid-3 .card-ph { width: calc(100% + 52px); max-width: none; margin: -28px -26px 8px; aspect-ratio: 3 / 2; }
.ind .card-ph { width: calc(100% + 52px); max-width: none; margin: -26px -26px 6px; aspect-ratio: 16 / 9; }
.split-ph { aspect-ratio: 4 / 3; border-radius: var(--radius); }
.hero-ph { width: 100%; max-width: 100%; aspect-ratio: 21 / 8; object-fit: cover; border-radius: var(--radius); margin-top: 10px; background: var(--tint); }
@media (max-width: 700px) { .hero-ph { aspect-ratio: 16 / 10; } }
.svc-ph { aspect-ratio: 4 / 3; border-radius: var(--radius); margin-bottom: 16px; }

/* COA 2: soft light-green sections replace heavy dark bands */
.soft { background: var(--tint); border-block: 1px solid var(--line); }
.soft .creds li { border-top: 1px solid var(--line); }
.soft .creds .k { color: var(--copper-text); }
.soft .creds .v { color: var(--ink); }
.soft .lede, .soft p { color: var(--muted); }
.soft .eyebrow { color: var(--copper-text); }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }